Maek s



(No Model.)

M. S. HUFF.

ROTARY ENGINE.

No. 324,698. Patented Aug. 18, 1885.

M/VE/WUR B AfforneyS MARK S. HUFF, OF SUTTON, \VEST VIRGINIA, ASSIGNOR OF ONE-HALF TO PEMBROKE B. BERRY, OF SAME PLACE.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 324,698, dated August 18, 1.885. Application filed June 8, 1885. (No model.)

T all whom, it may concern: one of the buckets or abut-ments thereof and Be it known that I, MARK S. HUFF, a citiforces it around in the direction indicated by zen of the United States, residing at Sutton, the arrow in Fig. 1. The valve H drops bein the county of Braxton and State of WVest hind the abutment or bucket and prevents the Virginia, have invented a new and useful Imescape of steam at that point. As the piston provement in Rotary Engines, of which the rotates, the eccentric works the valve in the following is a specification,reference being had steanrchest, and the eccentric and the buckto the accompanying drawings. ets in the piston are so timed with relation to My invention relates to an improvement in each other that theinlet-opening in the steamrotary engines; and it consists in the peculiar chest is closed and the supply of steam cut off construction and combination of devices that just before either of the buckets reaches the will be more fully set forth hereinafter, and valve H. This relieves the pressure of steam particularly pointed out in the claims. on the valve H, and allows said valve to be In the accompanying drawings, Figure 1 is raised by the bucket as it passes beyond it,

1 a side elevation of an engine embodying my and immediately thereafter the valve again invention partly in section. Fig. 2is atranssinks into the groove of the piston and a new verse section taken on the line 00 00 of Fig. 1. supply of steam is admitted, which, by bear- A represents the bed of the engine, in the ing between the valve H and the bucket, confront end of which is journaled a circular tinues the impulse of the piston.

piston, B, which is provided with trunnions Having thus described my invention, I 4

C, and which has a grooved periphery, D. claim At diametricalIy-oppositesidesofthepiston, 1.. The combination of the rotating piston buckets or abutments E are arranged transhaving the grooved periphery and the abutversely in the groove D, and an eccentric, F. ments or buckets, the case encircling the pis- 2 5 is secured on one side of the piston. ton, and the valve H, pivoted in the case and G represents a semicircular case, which is hearing normally in the groove of the piston, bolted to or formed with the bed A, and which substantially as described. envelops the upper side of the piston. In a 2. The combination of the bed-plate, the recess which is formed in this case is pivoted inclosing case G, having the valve H, the

a gravity-valve, H, which rests normally in steam-chest. having the inlet-opening and the 7 the groove D of the piston. outlet-opening communicating with the case I represents a steam-chest, which is con- G, near the valve H, with the rotary piston, nected with the boiler, and is provided with having the buckets and a grooved periphery, an inlet-pipe, K, and an outlet-pipe, L, which the valve H,bearing in said groove, a valve in extend through the case G and communicates the steam-chest for closing the supply of steam with the groove of the piston just above the as the buckets reach the valve H, and the ecvalve H. A slidevalve, M, rcciprocates in centric and rod for operating the valve, subthe steam-chest, and is operated by a rod, N, stantially as described. and an eccentric-strap, O, which connect it In testimony that I claim the foregoing as 0 with the eccentric F. A case, G, on the side my own I have hereto affixed my signature in opposite to the valve H, isprovided with an presence of two witnesses.

exhaust port or pipe, I. MARK S. HUFF. The operation of myinvention is as follows: WVitnesses: Steam is admitted from the steam-chest into A. WV. OORLEY, 5 the groove of the piston, and bears against E. L. BLAND. 

